Update phpunit/phpunit requirement from ^9.5 to ^10.5

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.5.20/ChangeLog-10.5.md)
- [Commits](sebastianbergmann/phpunit@9.5.0...10.5.20)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

composer.json

@@ -32,7 +32,7 @@
         "phpstan/phpstan-doctrine": "1.3.40",
         "phpstan/phpstan-strict-rules": "^1.3.0",
         "phpstan/phpstan-webmozart-assert": "^1.2.0",
-        "phpunit/phpunit": "^9.5",
+        "phpunit/phpunit": "^10.5",
         "polishsymfonycommunity/symfony-mocker-container": "^1.0",
         "robertfausk/behat-panther-extension": "^1.1",
         "sylius-labs/coding-standard": "^4.2",